DZ1 RANGE OF

MOULDED CASE CIRCUIT BREAKERS

A technology idea often forms
the foundation of innovation in
a product and the success of
its outcome is determined by
the users' experience. Talking
to customers and taking their
feedback gives an assurance
that the innovation would meet
the expected and even aspired
results. The dsine DZ range is an
outcome of users' feedback that
has been recorded, analysed and
incorporated in its design and
development journey.

Lauritz Knudsen
Lauritz Knudsen 1
Lauritz Knudsen Electrical & Automation
is constantly engaged in
adding value to the business
of customers like you.

Lauritz Knudsen 2
Index

STANDARD & APPROVALS 1

RANGE FEATURES 6

TECHNICAL DATASHEET 10

ACCESSORIES 11

ADDITIONAL TECHNICAL INFORMATION 17

CHARACTERISTIC CURVES 18

DIMENSIONS 24

Lauritz Knudsen 3
Standards & Approvals

DZ1 range of MCCBs and Accessories

comply with following International Standards
› IEC 60947-1, EN 60947-1, IS/IEC 60947-1
Low-voltage switchgear and controlgear, Part 1: General Rules
› IEC 60947-2, EN 60947-2, IS/IEC 60947-2
Low-voltage switchgear and controlgear, Part 2: Circuit-breakers
› IEC 60947-3, EN 60947-3, IS/IEC 60947-3
Low-voltage switchgear and controlgear, Part 3: Switches, disconnectors, switch-disconnectors and fuse
combination units
› IEC 60947-4, EN 60947-4, IS/IEC 60947-4
Low-voltage switchgear and controlgear, Part 4: Contactors and Motor-starters Third party certificates
(ERDA/CPRI) available for E&A’s range of MCCBs

NABL

E&A’s Switchgear Testing Lab holds NABL accreditation, acknowledging its technical competence
in testing as per the ISO/IEC 17025:2005 Standard. Accredited labs must consistently meet
accreditation criteria, verified through Surveillance and Re-assessment visits by NABL. Additionally,
accredited labs demonstrate technical proficiency through participation in recognized Proficiency
Testing Programmes.
All MCCBs undergo testing at E&A’s NABL accredited Switchgear Testing Lab, contingent upon
ongoing compliance with these standards and NABL’s additional requirements

Marking

A CE marking signifies that a product meets the essential requirements of relevant European
laws or directives concerning safety, health, environment, and consumer protection. It is typically
achieved through self-declaration and is mandatory for products within the European Economic
Area (EEA) to facilitate intra-regional trade. The responsibility for affixing the CE marking lies with
the manufacturer or their authorized representative within the EEA. This marking serves as proof
that the product complies with unified regulations across EEA countries, promoting unrestricted
trade among member states. E&A’s MCCBs complies with the Low Voltage Directive 73/23/EEC
as amended by Directive 93/68/EEC, provided they are used as intended, installed, and maintained
according to industry standards and operating instructions.

IECEE CB SCHEME - DEKRA Certified

The IECEE CB Scheme is an international agreement involving multiple countries and certification
bodies. Manufacturers can utilize a CB test certificate issued by a recognized National Certification
Body (NCB) to obtain certification marks from other accepted NCBs in the countries where they are
located. E&A’s MCCBs are certified under the IECEE CB Scheme by DEKRA, a globally recognized
organization with a 150-year history in testing, inspections, certification, risk management, and
verification.

Lauritz Knudsen 4
User Centric Innovation

The dsine DZ range is designed to meet the requirements of

today’s evolving electrical systems in modern installations.
Protection units in thermal magnetic as well as microprocessor
versions offer comprehensive protection for all needs.

Lauritz Knudsen 5
Range Features

› Rated Current: 16 A to 160 A › No load line bias

› Available in 3 Pole & 4 Pole › Ambient temperature compensation upto 55°C*
› Protection using both thermal magnetic & microprocessor › Ics=100% of Icu
based release
› Suitable for isolation
› Various types of terminations
› Wide range of internal and external accessories
› Switch disconnector and motor backup versions
› Conforms to IS 60947-2, IEC 60947-2 and EN 60947-2

DZ1

Breaking Capacity (kA) Ics= 100%

Protection Release Ratings (A)
of Icu

Thermal Magnetic 16, 20, 25, 32, 40, 50, 63, 80, 100, 125, 160

Microprocessor 25, 40, 63, 100, 160 36, 50

Only Magnetic 16, 20, 25, 32, 40, 50, 63, 80, 100, 125, 160

* No Deration up to 55OC

Protection Release Features

› Wide range of protections using thermal magnetic and microprocessor based trip unit
› Long time (overload) setting starts from 0.25In for iTRP-1 release and 0.67In for thermal magnetic release
› Transparent release cover

Thermal Magnetic Release

› Adjustable overload setting

› Adjustable short circuit setting*
› True RMS sensing

TM - A

Frame DZ1

Rated Current (A) 16, 20, 25, 32, 40, 50, 63, 80, 100, 125, 160

Protection LI

Over Load (Phase)

Current Setting Ir (Ir = x In) 0.67 to 1 x In

Instantaneous

Current Setting Ii (Ii = x In) 6 to 12 x In*

*16 A to 50 A : Fixed Magnetic 375 A

Lauritz Knudsen 6
Microprocessor Releases

iTRP-1

› Wide range of overload setting starting from 0.25In › Adjustable Instantaneous Setting
› Adjustable Trip class › Thermal Memory with option of Defeat
› Neutral overload protection › Provision for release testing
› Short circuit setting with delay or Instantaneous option

iTRP-1

Frame DZ1

Rated Current (A) 25, 40, 63, 100, 160

Protection LS/IN

Over Load (Phase)

Current Setting Ir (Ir = x In) 0.25 to 1 x In (in step of 0.05)

Time delay, tr (Inverse) 10s at 6Ir , 3s at 6Ir , 10s at 7.2 Ir , 3s at 7.2Ir

Protection Mode ON/OFF

Thermal Memory ON/OFF

Over Load (Neutral)

Current Setting In (In = x Ir) OFF / 1.0 x Ir

Time delay, tr (Inverse) As per Overload Curve Setting

Protection Mode ON/OFF

Short Circuit

Current Setting Is (Is = x Ir) 1.5 to 12 x Ir (in step of 0.5)

Time delay, ts As per I2t curve /150 msec

I2t ON/OFF

or Instantaneous

Current Setting Ii (Ii = x In) 1.5 to 12 x In (in step of 0.5)

Lauritz Knudsen 7
iTRP-2

› Wide range of overload settings from 0.25ln › Thermal memory defeat

› Adjustable neutral overload protection › Provision for release testing
› Short circuit setting with delay › Individual fault indication LEDs
› Adjustable instantaneous setting

iTRP-2

Frame DZ1

Rated Current (A) 25, 40, 63, 100, 160

Protection LSIN

Over Load (Phase)

Current Setting Ir (Ir = x In) 0.25 to 1 x In (in step of 0.05)

Time delay, tr (Inverse) 10s at 6Ir,

Protection Mode ON/OFF

Thermal Memory Enable/Disable

Over Load (Neutral)

Current Setting In (In = x Ir) OFF / 0.5/ 1.0/ 2.0 x Ir

Time delay, tr (Inverse) As per Overload Curve Setting

Protection Mode ON/OFF

Short Circuit

Current Setting Is (Is = x Ir) 1.5, 3, 4.5, 5.5, 6, 7, 8.5, 10 x Ir

Time delay, ts 100ms/200ms

It
2
ON/OFF

Protection Mode ON/OFF

Instantaneous

Current Setting Ii (Ii = x In) 6 & 12 In

Protection Mode ON/OFF

8
iTRP-3

› Wide range of overload settings from 0.25ln › Thermal memory defeat

› Adjustable neutral overload protection › Provision for release testing
› Short circuit setting with delay › Individual fault indication LEDs
› Adjustable instantaneous setting › Inbuilt earth fault protection

iTRP-3

Frame DZ1

Rated Current (A) 25, 40, 63, 100, 160

Protection LSING

Over Load (Phase)

Current Setting Ir (Ir = x In) 0.25 to 1 x In (in step of 0.05)

Time delay, tr (Inverse) 10s at 6Ir,

Protection Mode ON/OFF

Thermal Memory Enable/Disable

Over Load (Neutral)

Current Setting In (In = x Ir) OFF / 0.5/ 1.0/ 2.0 x Ir

Time delay, tr (Inverse) As per Overload Curve Setting

Protection Mode ON/OFF

Short Circuit

Current Setting Is (Is = x Ir) 1.5, 3, 4.5, 5.5, 6, 7, 8.5, 10 x Ir

Time delay, ts 100ms/200ms

It
2
ON/OFF

Protection Mode ON/OFF

Instantaneous

Current Setting Ii (Ii = x In) 6 & 12 In

Protection Mode ON/OFF

Earth Fault

Current Setting Ir (Ir = x In) 0.2, 0.4, 0.5, 0.7 x In

Time delay, tr (Inverse) 100ms/200ms

Protection Mode ON/OFF

Lauritz Knudsen 9
Technical Data Sheet

Frame DZ1-160
Type D N
Current Range In (A) 16-160
Release TM(VTVM)/Microprocessor*
Poles 3P/4P
Impulse Withstand Voltage Uimp (kV) 8
Rated Operational Voltage Ue (V AC) (MAX) @ 50 / 60 Hz 415
Rated Operational Voltage Ue (V DC) (MAX) 500
Rated Insulation Voltage Ui (V AC) 800
Utilization Category A
Standard IS 60947-2, IEC 60947-2, EN 60947-2
220 / 230 V AC 50 / 60 Hz 45 65
Icu(kA)
400 / 415 V AC 50 / 60 Hz 36 50
Rated Short Circuit Breaking Capacity
220 / 230 V AC 50 / 60 Hz
Ics as % of Icu 100%
400 / 415 V AC 50 / 60 Hz
Making Capacity (kA) @ 415 V AC 75.6 105
Mechanical 30000
Life
Electrical @ 415 V AC 10000
Operating Frequency (Hz) 50/60
Opening Time < 10 msec
Finger proof Terminals Yes
Suitable for Isolation Yes
IP Class IP20/IP40$ and IP54 with Extended ROM
Pollution Degree III
Load-Line Bias No
Ambient Temperature - 5OC to 55OC
Storage Temperature - 15OC to 70OC
Mounting Positions in Vertical Plane Vertical and 90O in both directions
3 Pole 130 x 75 x 60
Dimensions (H x W x D) (mm)
4 Pole 130 x 100 x 60
Weight (kg) 3P/4P 0.9/1.1
Auxiliary Contact 1 C/O 01 no. Aux
Trip Alarm Contact 1 C/O 01 no. TAC
Internal
Shunt Release
01 no. Shunt or 01 no. UV
Under Voltage Release
Rotary Operating Mechanism

(Direct/Extended)
Accessories Mechanical Interlock Kit 
Spreader Terminals 
External Rear Terminals 
Box-Clamp# 
Plug-in 
Electrical Operating

Mechanism
*VTVM - Variable Thermal Variable Magnetic
*16 A to 50 A: Fixed Magnetic 375A
$ IP20: At the Terminals, IP40: At Front Face
# For details contact nearest branch office

Lauritz Knudsen 10
Accessories

Frame DZ1
Internal Accessories
AUX TAC

DZ1 MCCB provides a diverse selection of accessories with up

to 3 cavities available for a variety of combinations, offering
maximum flexibility to customers without the need to open the
main cover or access live parts during installation.
UV
SHUNT

Auxillary and Trip Alarm Contacts are provided to transmit

circuit-breaker operating status information (ON/OFF)
externally and indicate when the circuit-breaker has tripped or
operated due to a fault in the electrical system.

Internal Accessories Contacts/Voltage (Vac) Frame Maximum available cavaity (nos)

Auxiliary Contact 1 C/O DZ1 1 (Left)
Trip Alarm Contact 1 C/O DZ1 1 (Left)
24, 48, 110, 240, 415 V AC
Shunt Release - Size 1 DZ1 1 (Right)
12, 24, 48, 110, 220 V DC
Under Voltage Release - Size 1 24, 48, 110, 240, 415 V DZ1 1 (Right)

Shunt Release

This device enables the MCCB to be opened using an electrical range of 70% to 110% of the rated power supply voltage (Ue),
command. The release operation is assured within a voltage applicable in both AC and DC systems.

Shunt Release - Size 1 for DZ1

Voltage (Vac) 50/60 Hz Pick up Power (VA) Hold On power (VA)
415 6 4
240 4 2
110 4 2
48 4 2
24 4 2

UV Release

The Under-voltage release triggers the MCCB to trip when the the under-voltage release is de-energized, the MCCB cannot
operating voltage drops between 35% and 70% of its rated be closed. Additionally, the UV release can be employed
value, or if no voltage is applied. It mechanically locks the for interlocking purposes, such as DG synchronization and
MCCB’s closing mechanism, preventing closure both manually paralleling of transformers.
and electrically under low or no voltage conditions. When
Under Voltage Release - Size 1 for DZ1
Voltage (Vac) 50/60 Hz Pick up Power (VA) Hold On power (VA)
415 6 3
240 3 2
110 3 2
48 4 2
24 4 2

Lauritz Knudsen 11
External Accessories

Rotary Operating Mechanism (ROM)

Rotary Operating Mechanism (ROM) used in dsine DZ1 is Extended ROM: The ROM is equipped with extensions or
available in two variations: Direct and Extended versions. additional components, possibly for specific applications
or installations where a longer reach or different operational
Direct ROM: The ROM is directly attached to the operating setup is required.
mechanism of the MCCB and is used to manually operate the
breaker.

Features:
› Clear indication for ON/OFF/TRIP status
› Direct access to the “Push to Trip” button
› Adjustable misalignment tolerance in the extended version by +/- 6 mm
› Suitable for use in any quadrant
› Door interlock feature when in ON mode, with option to override
› Door interlock feature when in OFF mode, with padlock capability
› Supports three padlocks with diameters ranging from 5mm to 8mm
› Door sensing functionality
› Mechanical interlock compatibility with various keylock types such as Ronis,
Kirk, Allen-Bradley, Fortress, Castle, etc.
› Ingress Protection (IP) ratings of IP42 and IP54 for the direct and extended
versions respectively

Mechanical Interlock (MIL)

In source change-over systems, the Mechanical Interlock (MIL) especially in environments prone to high vibrations. They are
prevents simultaneous connection to both power sources. typically used alongside electrical interlocks.
When two MCCBs operate in parallel, there’s often a need to
The new dsine DZ1 offers three versions of Mechanical
mechanically interlock them. This ensures that while one
Interlocks, each tailored to different interlocking philosophies.
MCCB is switched ON, the other remains OFF, allowing only one
MCCB to be closed at any given time. MILs are also essential
in Automatic Transfer Switch (ASTS) setups for added safety,

1. Mechanical Interlock using Front Slider :

Two MCCBs installed side by side can be interlocked using Some of the salient features are:
the Front Slider MIL. This interlocking mechanism prevents › Minimum 26 mm clearance between 3P and 4P with
unintentional operation through mechanical feedback. Key
features include: spreaders.
› Three padlock options: ø5 mm to ø8 mm in 3 conditions
(IO-OO-OI).
Construction Details:
› Uniform design for both 3P and 4P configurations.
The Front Slider MIL is designed for fixed installations in › Compatible with all termination types applicable to basic
both 3P and 4P configurations. It comprises a Base Bracket MCCBs.
Assembly and Slider Assembly. The Base Bracket Assembly
secures the Slider Assembly to the panel’s mounting plate.

The Front Slider MIL accommodates the placement of three

padlocks in three interlock positions: either one MCCB in the
ON state or both MCCBs in the OFF state. These positions are
visually indicated on the front panel with the symbols IO-OO-OI.

Note: MCCBs mounted with EOMs and ROMs are not compatible with
Front Slider MIL
Lauritz Knudsen 12
2) Mechanical Interlock using Rear Base Plate with Cable
Two MCCBs can be interlocked using the Rear Base Plate MIL This setup allows operators to conveniently access front
with cable, available in lengths of 1m, 3m, and 5m. Interlocking controls and status indications of the MCCBs, with the cable
is achieved through a mechanism situated behind the base offering flexibility for installation at distances up to 5m.
plate of the installed MCCBs, coupled with a feedback cable.

Construction Details:
The Rear Base Plate MIL with Cable is designed for fixed, plug-
in, and draw-out versions of both 3P and 4P MCCBs. It includes
two base plates equipped with operating lever mechanisms,
actuators, and a connecting cable.
The cable, installed between the two operating lever
mechanisms, enables effective interlocking between the two
MCCBs. After mounting the MCCBs on their respective base
plates, the cable is adjusted to ensure proper interlocking
functionality.
This setup allows flexibility in positioning and orientation of the
two base plate assemblies within the panel, accommodating
various installation configurations.

Some of the salient features are:

› Minimum 26 mm clearance between 3P and 4P with spreaders and rear termination linked to the base plate.
› Capability to interlock different types of MCCBs.
› Uniform design suitable for both 3P and 4P configurations.
› Compatibility with all termination types applicable to basic MCCBs.
› Suitable for withdrawable plug-in and draw-out modules, accommodating all types of MCCB terminations.
› Compatibility with MCCBs equipped with ROMs and EOMs.
› Suitable for horizontal or vertical mounting orientations.
› Cable lengths available in 1m, 3m, and 5m options to meet various installation requirements.

Baseplate Selection

Baseplate Unsuitable Baseplate Suitable

for Rear Termination for All Type of Termination

DZ1

A B

A L L
DZ1
B M

Both the Cables : L and M come in the lengths of 1m, 3m and 5m

Lauritz Knudsen 13
3. Mechanical Interlocking using Key Locks :
For mechanical interlocking through extended rotary operating
mechanism, a panel mounted key lock is available. The
selection of the key lock as per the table:
I/C1 I/C2 I/C3

Incommers
Lock 1 Lock 2 Lock 3 (I/C)

Bus c ouplers
Lock 1 2L ock 23 (B/C)
B/C1 B/C2

Key Lock Selection:

I/C or B/C Key Lock Type of lock Exclusively operable by key nos.

2 l/C Any 1 type of lock for both MCCBs 1 1

2 2
2 I/C and 1 B/C Lock 1 and Lock 2 for I/C and Lock 12 for B/C
3 3
3 I/C and 2 B/C Locks 1, 2, 3 for I/Cs and Locks 12, 23 for B/Cs
12 1, 2 & 12
23 2, 3 & 23

Terminations

Cable 2.5 mm to 25 mm2

DIRECT Link (11 to 16)mm wide x (2 to 5)mm thick
TERMINAL
Tightening Torque Max 6N-m at MCCB termination

Basic Breaker is suitable for DIRECT termination.

LINK / LUG width(W): 25 < W < 30mm

Cable 2.5 mm2 to 95 mm2

SPREADER Link (16 to 25) mm wide x (3 to 6)mm thick
TERMINAL Tightening Torque Max 6N-m at MCCB termination

Flexible 2.5 mm to 70 mm2

BOX CLAMP Rigid 2.5 mm to 95 mm2
TERMINAL Tightening Torque Max 6N-m at MCCB termination

Cable 95mm2
REAR Link (16 to 25)mm wide x (2 to 4)mm thick
TERMINAL Tightening Torque Max 6N-m at MCCB termination

Lauritz Knudsen 14
Plug-in-Module

MCCBs equipped with plug-in modules are utilized in connections or terminations. It can then be promptly replaced
environments requiring enhanced service continuity, such with a new MCCB.
as hospitals, process industries, and the automotive sector.
Upon removal from the plug-in base, the MCCB achieves
These applications often necessitate swift replacement
complete isolation from the power supply, ensuring the safety
capabilities. In these scenarios, a plug-in base MCCB can be
of personnel working on downstream feeders.
safely extracted from the system without disrupting power
Construction Details:
The dsine DZ MCCB Plug-in module includes the following
Specifications Plug-in DZ1
accessory kits:
Plug-in Base: This fixed component can be panel or rail Microprocessor
160
mounted. It is made of insulated thermoset material and Release
accommodates socket assemblies, auxiliary switch assembly, Maximum Rated current
IP covers, finger shields, terminals, mounting plates, shields, (A) Thermal
and features a slot for MIL (Mechanical Interlock) actuation. 144
Magnetic
(derated by 10%)
Conversion Kit: Includes a rear plate assembly with a safety Release
lock mechanism. The rear plate attaches to the MCCB’s rear
Max Operating Voltage Ue
side using screws . The safety lock prevents MCCB movement 415
(Vac)
when in the ON position by locking against the corresponding
surface in the Plug-in Base. Max Operating Voltage Ue
500
(Vdc)
Contact Stud Plugs: These plugs are fastened to the MCCB
terminals and establish electrical contact with the Plug-in Base Rated frequency (Hz) 50/60
terminals through socket assemblies. 3P 75 x 171 x 60
Dimension (mm),
Handles: Thermoplastic components inserted on the terminal WxHxD 4P 100 x 171 x 60
side of the MCCB facilitate easy removal of the breaker from
the Plug-in Base when in the OFF position. "Short time withstand,
Icw (kA) 25 kA for 30 ms
Mounting Screws: Used to secure the breaker to the Plug-in for Plug-in contacts"
Base. Insulation Voltage Ui (Vac) 800
These components and kits ensure the dsine DZ MCCB Plug-in Impulse Voltage Uimp (kV) 8
module offers robust functionality and flexibility for installation
and operation across various applications. Safety Interlock
Safety feature
Aux. Indication
Features:
Mechanical Life 200 operations
› Built-in safety interlock prevents insertion or removal of
IP 20 (Without breaker)
MCCB while in the ON position. Ingress Protection
IP 40 (With breaker)
› Compatible with various termination methods: direct, spreader
Mounting
links, box clamps, and rear terminals. Vertical / Horizontal
orientation
› Provides accurate MCCB position indication: service or isolate. Direct ROM Yes
› Offers options for both base mounting and 35 mm rail mounting. Extended ROM Yes

› Ingress Protection (IP): Electrical

Operating Yes
» IP20 when MCCB is unplugged. Mechanism
External Accessory
» IP40 when MCCB is plugged in. Suitability Yes (Cable and Base
MIL
Plate type)
Spreader Yes
Rear Terminals Yes
Keylock Yes

Lauritz Knudsen 15
Electrical Operating Mechanism

Electrical Operating Mechanisms (EOM) are extensively compact and swift in operation, with a switching time of less
employed for remote switching and automatic source than 150 ms, ensuring dependable source changeover. These
changeover systems. They are utilized across various sectors Electrical Operating Mechanisms OR Motor Operators are
including industrial, infrastructure, and critical installations suitable for MCCBs with current ratings up to 160A.
such as hospitals. The DZ1 EOMs stand out as the most

Salient Features

› Compact EOM measuring 87 x 75 x 100 mm (HxWxD)

› Operates within a wide voltage range of 150 V AC to 270 V AC.
› Equipped with a pop-up type padlock for securing MCCB in both ON and OFF state.
› Three operational modes:
» Auto Mode: Enables electrical operation; manual operations and padlocking are disabled.
» Manual Mode: Allows manual operation; electrical operations and padlocking are disabled.
» Lock Mode: Prevents operation; both Auto and Manual modes are disabled while padlocking is possible.
› Ingress protection rated IP40.
› Single-hand hinge-out feature with retention snaps for easy access to internal MCCB accessories such as AUX/TAC and
UVR/SR & without un-mounting EOM.
› Ergonomic supplementary handle facilitates easy manual operations.
› Endurance life up to 30,000 operations (equivalent to 100% mechanical life of the MCCB) ensures reliable switching.
› Easy access to MCCB terminations without un-mounting EOM for assembly and maintenance.
› Compatible with Plug-in Module and Cable Base Plate MIL.

Specifications

Specification DZ1

Operating voltage (V AC) 240 V AC

Operating voltage (% of rated) 75 - 110 %

Closing time (ms) < 100

Opening time (ms) < 100

Power consumption (VA) 500

Life/no of operation 30,000

IP Protection IP40

Operating frequency 2/min

Min control pulse time (ms) 50 - 150

Lauritz Knudsen 16
Additional
Technical Information

Altitude Correction Factors

Altitude does not significantly affect circuit breaker characteristics The following tables give the altitude correction factors for
upto 2000 m. Above this altitude, it is necessary to take into various circuit breaker characteristics
account the decrease in the dielectric strength and cooling
capacity of air.

De-rating Factor
Description
<2000 m 3000 m 4000 m 5000 m

Rated Operational Voltage Ue 1.00 0.90 0.80 0.70

DZ1
Rated Nominal Current In 1.00 0.97 0.94 0.91

Insulation Voltage Ui 1.00 0.78 0.69 0.61

Impulse Withstand Voltage Uimp 1.00 0.78 0.69 0.61

Power Loss Data

The power loss of an electrical device is essential for under rated current in free air and with minimal voltage
determining the overall system efficiency, measured in watts. drop across the terminals under cold conditions, provides
According to Annex G of IEC-60947-2, the total power loss of a an indication of the heat generated in specific operational
circuit breaker is calculated by multiplying the power loss per scenarios.
pole by the number of poles. This measurement, conducted

Frame Rating (A) Power loss per pole (W) Frame Rating (A) Power loss per pole (W)
16 3.8 25 1.5
20 6.0 40 2.2
25 5.0 DZ1-MPR 63 3.0
32 8.2 100 5.0
40 4.8 160 12.8
DZ1-TMR 50 7.5
63 7.4
80 8.0
100 8.0
125 9.4
160 14.1

Temperature Derating Details

Dsine DZ derating is 1% of In/oC, starting from 50oC for TMR Dsine DZ derating is 1% of In/oC, starting from 55oC for MPR
For example, For example,
In=100A for DZ1 TMR, derating will start from 50oC to 70oC In=100A for DZ1 MPR, derating will start from 55oC to 70oC
At 60oC @ In = 100A At 60oC @ In = 100A
Deration would be (60oC -50oC) x 1A Deration would be (60oC -55oC) x 1A
= 10oC x 1A = 5oC x 1A
= 10A = 5A
i.e. 100A-10A = 90A i.e. 100A-5A = 95A

Lauritz Knudsen 17
Characteristic Curves

Trip Curves - Thermal Magnetic Release

iTMAF @12In
DZ1 160 (In: 16A-50A)
10000

1000

100

10
Trip Time (S)

Ii = 375 A
1

0.1

0.01

0.001
0.1 1 10 100
Multiples of Current

DZ1 160 (In: 63A-160A)

Trip Time (S)

Multiples of Current

Lauritz Knudsen 18
Trip Curves - Microprocessor Release (iTRP)

Overload 6Ir @ 3s
10000

6.0 Ir - 3 Sec
1000

100
Trip Time (S)

10

0.1

0.01
12 3 5 10 30
x Ir
Current Multiples

Overload 7.2Ir @ 3s
10000

7.2 Ir - 3 Sec
1000

100
Trip Time (S)

10

0.1

0.01
12 3 5 10 30
x Ir
Current Multiples

Lauritz Knudsen 19
Overload 6Ir @ 10s
10000

6.0 Ir - 10 Sec
1000

100
Trip Time (Secs)

10

0.1

0.01
12 3 5 10 30
x Ir
Current Multiples

Overload 7.2Ir @ 10s

10000

7.2 Ir - 10 Sec
1000

100
Trip Time (Secs)

10

0.1

0.01
12 3 5 10 30
x Ir
Current Multiples

Lauritz Knudsen 20
Trip Curves - Microprocessor Release (iTRP)

Short-Circuit & Instantaneous - iTRP-1

10000

1000

100
Trip Time (Secs)

10

STS
-I ²t
ON

150 ms

0.1
STS-I²t OFF
o
I < 10 ms

0.01
12 3 5 10 30
x Ir
Current Multiples

Short-Circuit & Instantaneous - iTRP-2 / iTRP-3

10000.00

1000.00
Trip Time (Secs)------->

100.00

10.00

STS
-I²t
ON

1.00

200 ms

100 ms
0.10
Io< 10 ms
STS-I²t OFF

0.01
1 2 3 5 10 30
x Ir------>
Current Multiples

Lauritz Knudsen 21
Trip Curves - Microprocessor Release (iTRP)

Earth Fault - iTRP-3

1

100 ms
Trip Time (S)

0.1 200 ms

0.01
0.1 1

Input Current (*In)

Lauritz Knudsen 22
Current-Limiting Curve

DZ1 @ 415V
500

I-peak (kA)

50
45
40
35
30
25 D N
20 DZ1-160

15

10

-----I prospective
5
11 0 100 1000

I-rms (kA)

Energy-Limiting Curve

DZ1 @ 415V
1
0.90 D, N means?
0.80
N
0.70 D DZ1-160

0.60

0.50
Let Through Energy - A2S x 106

0.40

0.30

0.20

0.10 1 10 50
11 0 100 1000

I-rms (kA)

Lauritz Knudsen 23
Dimensions

Overall MCCB Dimensions

3 Pole 4 Pole
75 100 90
74
60
116
130

25 12.5 25 12.5

Mounting Dimensions

3 Pole 4 Pole
4 Holes, M3.5 4 Holes, M3.5
114

114

25 50

All dimensions are in mm

Lauritz Knudsen 24
Panel Cutout

Panel Door Cutout Panel Door

25 25

26
26

47
47
114

60
80 80

Overall MCCB Dimensions with Spreader Links

3 Pole 4 Pole 90
74
C C
BB BB B 60
Ø8.5 Ø8.5 15
D
200
176

200
176

A A 15

MCCB No. of Poles Spreader Kit No. / Dimension A B C D

EM906090000 26 51 127
3P
EM906070000 20 45 115
DZ1 - 160 3
EM906100000 26 51 178
4P
EM906080000 20 45 160

All dimensions are in mm

Lauritz Knudsen 25
Direct Rotary Operating Mechanism

Dimensions with Bezel and MCCB Panel Door Cut Out Dimensions
LD 150 (Min)* 30
122
85

HINGE AXIS
All 4 holes

90
135
77

24.5
Panel Door 2mm

Frame A B L D
DZ1 90.5 56.5 100.5 50

Extended Rotary Operating Mechanism

L 69.4

L= Panel Depth
D= 147.5 mm

Panel Door 2mm Minimum L = 162

Vetical and horizontal references with respect to Panel cut out details as viewed from the front
MCCB mounting

14.5 10.5 39.5 10.5

47.5
66.5

4.5 HOLES

3 - Pole MCCB 4 - Pole MCCB

All dimensions are in mm

Lauritz Knudsen 26
Mechanical Interlocking Kit - Front Slider

D
A
C
B

50
A B C D
DZ1
25 114 M3.5 98.8

MCCB A E A MCCB B

C
D

F
B

3 POLE 3 POLE
A B C D E G H F
DZ1-DZ1
50 22.8 M5 30 90 235 135 30

Mechanical Interlocking with Key Locks

OVERALL DIMENSIONS DOOR CUTOUT DETAILS OVERALL DIMENSIONS

72 48.5 ° Ø50
45
Ø4.5 HOLES Ø76
L
Ø50
136
68

68

PANEL DOOR 2MM

Ø29

58 52 MCCB Min. Panel Depth

CUT-OUT FOR PANEL
MOUNTED KEY-LOCK
DZ1 225
Minimum panel depth for Rotory Operating MCCB Length of Shaft (LS)
Mechanism with panel mounted key lock
DZ1 L-102.5

Lauritz Knudsen 27
Mechanical Interlocking Kit - Rear Base Plate with Cable

A 55
A C
C
D
B

D
B
OVERALL DIMENSIONS
DZ1 A B C D
BASEPLATE A 100 222 70 204
BASEPLATE A
BASEPLATE B 164 282 75 264
BASEPLATE B

R80 mm

R80 mm

1. No sharp bending or looping/bundling of cable during or

after assembly
2. Ensure no free hanging of cable.
3. Cable should be supported appropriately at required locations.
4. Ensure no sagging of cable.

Electrical Operating Mechanism

175

75 115
87

All dimensions are in mm

Lauritz Knudsen 28
Plug-in Module

B1 B2 J
C C C CC M

K
Q
A
D
G
A

D
E

P
L

F F F
H1
H2 N

A B1 B2 C D E F G H1 H2 J K L M N P Q
171 75 100 25 157 151 25 51 62 87 120 20.5 18 60 150 166 36

Plug-in Module Spreader Dimension

D1 D2 H
J
C C C C C
G
G
F

F
E

E
B

A B C D1 D2 E F G H J
231.5 211.5 61 147 208 48 10 25 3 232

All dimensions are in mm

Lauritz Knudsen 29
Switchgear Training Centres

Pune Lucknow Delhi

Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation
Switchgear Training Centre Switchgear Training Centre Switchgear Training Centre
T-156 / 157, MIDC, C-6 & 7, UPSIDC, A-25, Imperia Complex, First Floor
Bhosari, Pune - 411 026 P. O. Sarojininagar, Mohan Cooperative Industrial Estate
Tel: 020-2712 0037 / 2712 0653 Lucknow - 226 008 Near Sarita Vihar / Mohan Estate Metro Station
E-mail: STC-PUNE@LK-EA.com Tel: 97944 54455 Main Mathura Road, New Delhi - 110044
E-mail: STC-LUCKNOW@LK-EA.com Tel: 9899020306 / 9720186726 / 9560845094
E-mail: STC-DELHI@LK-EA.com

Kolkata Vadodara Coonor

Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation
Switchgear Training Centre, Switchgear Training Centre Switchgear Training Centre
2nd Floor, Block BN3, Sector V, Behind L&T Knowledge City, Ooty-Coonoor Main Road
Salt Lake City, Near Village Ankhol, Yellanahalli P.O.,
Kolkata - 700091, West Bengal Vadodara - 390019 The Nilgiris - 643 243
Tel: 7738717893 / 7797795567 Tel: 0265 6147805 / 6147808 Tel: 0423 251 7107
E-mail: STC-KOLKATA@LK-EA.com E-mail: STC-VADODARA@LK-EA.com E-mail: STC-COONOOR@LK-EA.com

Customer Interaction Center (CIC)

Phone no: 022 6932 7800
Web: www.LK-EA.com | e-mail: CIC@LK-EA.com
 Electrical Standard
Products (ESP) Offices
HEAD OFFICE

Lauritz Knudsen Electrical & Automation, A/600, Shil-Mahape Road, TTC Industrial Area, MIDC Thane, Navi Mumbai, 400 710, Maharashtra.
Tel: 022-6722 6300 | Fax: 022-6705 1112 | e-mail: CIC@LK-EA.com

BRANCH OFFICES

Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation
C-201, The First Commercial Complex, Shri Daneshwari, 1st Floor, No.10, Fortuna Towers, 2nd Floor, A06/A07, Second Floor,
B/S Keshavbaug Party Plot, Vastrapur, Plot No. 17, 2nd Cross, Near Old Income Rana Pratap Marg, Near NBRI, Grand Chandra Complex, Frazer Road
Ahmedabad - 380 015 Tax Office Road, Vidyanagar, Lucknow - 226 001 Patna - 800 001
Phone No: 022-6932 7800 Hubballi - 580 021 Phone No: 022-6932 7800 Phone No: 022-6932 7800
e-mail: CIC@LK-EA.com Phone No: 022-6932 7800 e-mail: CIC@LK-EA.com e-mail: CIC@LK-EA.com
e-mail: CIC@LK-EA.com

Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation
Wework Central, #36 Infantry Road, AWFIS Space Solutions, Prestige Phoenix, El Dorado Building, 3rd Floor, 6, UrbanWrk, 5th Floor, Sai Radhe,
Bengaluru - 560 001 4th floor, 1405, Umanagar, Begumpet, Venkatraman Street, Chinna Chokkikulam, Raja Bahadur Mill Road, Behind Hotel
Phone No: 022-6932 7800 Hyderabad - 500 016 Madurai - 625 002 Grand Sheraton, Sangamwadi
e-mail: CIC@LK-EA.com Phone No: 022-6932 7800 Phone No: 022-6932 7800 Pune - 411 001
e-mail: CIC@LK-EA.com e-mail: CIC@LK-EA.com Phone No: 022-6932 7800
e-mail: CIC@LK-EA.com

Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation
Under O Launchpad, 4th Floor, Workie, 214 - 2nd Floor, Bestech Business Park, Office No. 211 & 212, Pithalia Plaza,
Unit-434, Esplanade 1, Rasulgarh, Apollo Premier, PU-4, Tower - A, 2nd floor, Sector - 66 KK Road, Near Fafadih Chowk,
Bhubaneswar - 751 010 Scheme No. 54, Vijay Nagar Square, Mohali - 160059 Raipur - 492 001
Phone No: 022-6932 7800 Indore - 452 010 Phone No: 022-6932 7800 Phone No: 022-6932 7800
e-mail: CIC@LK-EA.com Phone No: 022-6932 7800 e-mail: CIC@LK-EA.com e-mail: CIC@LK-EA.com
e-mail: CIC@LK-EA.com

Lauritz Knudsen Electrical & Automation, Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation,
801 Word Level-8, No. 28, Office No. 430, 4th Floor, TC II, Tower B, PRIMA BAY Gate No. 5, DevX 4th Floor, A Wing, Om 9 Square,
SIDCO Industrial Estate, Guindy, Jaipur Electronic Market, Riddhi Siddhi, Saki Vihar Road Powai, 150 Ft Ring Road, Near Nana Mava Circle,
Chennai - 600 032 Gopalpura Bypass, Mumbai - 400 072 Opp Silver Heights,
Phone No: 022-6932 7800 Jaipur - 302 018 Phone No: 022-6932 7800 Rajkot - 360 001
e-mail: CIC@LK-EA.com Phone No: 022-6932 7800 e-mail: CIC@LK-EA.com Phone No: 022-6932 7800
e-mail: CIC@LK-EA.com e-mail: CIC@LK-EA.com

Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation
Playworkz Coworking Space GDR Siddha, Ground Floor, N Road Unnati Building, 2nd Floor, 10th Floor, Titaanium Business,
43 & 44, 3rd Cross, Bistupur, Opposite St. Mary's Church, Automation Campus, A-600, TTC Industrial Bhimrad Road, Althan
Bharathy Colony, Peelamedu, Jamshedpur - 831 001 Area Shil-Mahape Road, Mahape, Surat - 395 017
Coimbatore - 641 004 Phone No: 022-6932 7800 Navi Mumbai - 400 710 Phone No: 022-6932 7800
Phone No: 022-6932 7800 e-mail: CIC@LK-EA.com Phone No: 022-6932 7800 e-mail: CIC@LK-EA.com
e-mail: CIC@LK-EA.com e-mail: CIC@LK-EA.com

Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation
3rd Floor, 1&2 Vijay Park, Business Communication Centre M1 & M2, Mezzanine Floor, 11th Floor, Block-D, Notus IT Park,
Main Chakrata Road, Opp. Anandam, 2nd Floor, Chiramel Chambers, Himalaya Excellency, Sarabhai Campus, Bhailal Amin Marg,
Near Ballupur chowk, Kurisupally Road, Ravipuram, Plot No. C-47, Pratap Nagar Square, Vadodara - 390 023
Dehradun - 248 001 Kochi - 682 015 Nagpur - 440 022 Phone No: 022-6932 7800
Phone No: 022-6932 7800 Phone No: 022-6932 7800 Phone No: 022-6932 7800 e-mail: CIC@LK-EA.com
e-mail: CIC@LK-EA.com e-mail: CIC@LK-EA.com e-mail: CIC@LK-EA.com

Lauritz Knudsen Electrical & Automation Lauritz & Knudsen Electrical & Automation, Lauritz Knudsen Electrical & Automation, Lauritz Knudsen Electrical & Automation
Ground Floor, B-27, 207, 2nd floor, Revolution Complex, 3rd floor, Naga Chambers, 3rd Floor, D/No. 12-1-16,
Biplab Rashbihari Sarani, Station Road, E Ward, Uttam Tower by Viraj Estate , Plot No. 49, Survey No. 1051, Waltair Main Road,
Sector 2A, Bidhan Nagar, Next to Pedestrian Bridge, Sharanpur Road, Visakhapatnam - 530 002
Durgapur - 713 212 Kolhapur - 416 001 Nasik - 422 002 Phone No: 022-6932 7800
Phone No: 022-6932 7800 Phone No: 022-6932 7800 Phone No: 022-6932 7800 e-mail: CIC@LK-EA.com
e-mail: CIC@LK-EA.com e-mail: CIC@LK-EA.com e-mail: CIC@LK-EA.com

Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation Lauritz Knudsen Electrical & Automation
6th Floor, Exotica Greens, A Block, 191, 2nd Floor, BN3, Salt Lake, Sector-V, A-25, 1st Floor, Imperia Complex,
R G Baruah Road, Guwahati Central, Kolkata - 700 091 Mohan Corporative Industrial Estate,
Guwahati - 781 005 Phone No: 022-6932 7800 Near Sarita Vihar Metro Station,
Phone No: 022-6932 7800 e-mail: CIC@LK-EA.com Mathura Road,
e-mail: CIC@LK-EA.com New Delhi - 110 044
Phone no: 022-6932 7800
e-mail: CIC@LK-EA.com

Product improvement is a continuous process. For the latest information and special application,
please contact any of our offices listed here. Product photographs shown for representative purpose only.

Lauritz Knudsen Electrical & Automation, Electrical Standard Product

A/600, Shil-Mahape Road, TTC Industrial Area, MIDC Thane, Navi Mumbai, 400 710,
Maharashtra, Phone No: 022-6722 6300 | Web: www.LK-EA.com

Customer Interaction Center (CIC)

Phone no: 022-6932 7800
Web: www.LK-EA.com | e-mail: CIC@LK-EA.com